By Edward O Price

ISBN-10: 0851997724

ISBN-13: 9780851997728

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A breeding program that attempted to equalize family size in each generation would have helped to preserve genetic diversity. Of course, equalizing family size to reduce genetic change under captive rearing is only effective if it correlates with equal reproductive success within and between families (Waples, 1999). Populations of social animals in captivity typically possess a number of demographic characteristics that naturally increase the magnitude of genetic drift and inbreeding relative to other evolutionary forces.

2000). , 1994). Barlow (1981) reviews evidence supporting this thesis by demonstrating that heterosis is more pronounced in stressful environments. e. hybrid vigor) is often observed when inbred lines suffering from inbreeding depression are mated together, because heterozygosity is restored. Specificity of stressors Dahlgaard and Hoffmann (2000) addressed the question of whether the deleterious effects of inbreeding are general to all stressors as opposed to being stressspecific. More specifically, they looked at the resistance of D.

1996) demonstrated that female Penaeus kerathurus shrimp can be successfully reared in captivity but fail to reproduce because they do not produce mature oocytes. In contrast, Primavera (1985) reported that some 14 species of marine penaeid shrimp that successfully mature and spawn in captivity have been identified. Browdy et al. (1986) have added Penaeus semisulcatus to that list. Control of Sex Ability to control sex may constitute an important pre-adaptation for the captive propagation of species in which one sex is valued more highly than another.

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Animal domestication and behavior by Edward O Price

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